Re: sxpath - or and not filters

Hello!

On Thu, 8 Jan 2004, Gordon Weakliem wrote:

> I'm trying to get the equivalent to the XPath "*|text()", in other words, I want to select just the text and element children of a node, not attributes.  For this reason, *any* is too broad.  For now, I can do sxml:content on the result of an sxpath, but I wonder if there's a more compact way to do this selection:
>
> (sxml:content (car ((sxpath '(atom:content) atom-ns) entry)))
>
> It looks like sxpath defines or@ and not@ operators, but I can't figure out how to use them and can't find an example, and my guesses haven't worked.

>Would these be the way to go, or is there a better way to do this?
Most universal way to do _anything_ like this (and more!) is to employ SXPath's
ability to use a function as a location step. Actually, symbols like *,
*text* etc. are just shortcuts for popular location step functions.

So, in SXPath you can define your own function (a luxury denied by XPath)
and use it in location path:

For example,

(define (content nodeset root vars)
	  (map sxml:content nodeset))

((sxpath `(atom:content ,content) atom-ns) entry)

BTW: you can use
  ((car-sxpath ...
instead of
(car ((sxpath ...

>Can someone provide an example of how these operators work?

(sxpath '(html (or@ head body)))

Please note that due to rewriting using ntype-names??
(see docs on "sxpath" function) only node names are acceptable,
and not special symbols like *text* etc.

Best regards,
         Kirill.




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